People getting upset at simulation theory is similar to philosophical arguments over free will, or theological arguments over predestination. Implied in the simulation concept is pre-programming….that we’re a bunch of npcs with preordained pathways defined in code by whomever wrote the sim.
Many people (present company included) like the concept of free will, and see life as a choose your own adventure book. While much of our background environment and physical selves are hard coded (dna, physics, biology), we have the ability with the gift of consciousness to change trajectory and thus have some control of our outcome. We can quite literally alter the code.